package com.example.bpmn.aspect;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class IdempotentAspect {
    
    @Around("@annotation(com.example.bpmn.annotation.Idempotent)")
    public Object handleIdempotent(ProceedingJoinPoint point) throws Throwable {
        String key = generateKey(point);
        if (isProcessed(key)) {
            return getFromCache(key);
        }
        return proceed(point, key);
    }
    
    private String generateKey(ProceedingJoinPoint point) {
        // 生成幂等性键
        Object[] args = point.getArgs();
        String methodName = point.getSignature().getName();
        return String.format("%s:%s", methodName, args[0].toString());
    }
    
    private boolean isProcessed(String key) {
        // 检查是否已处理
        return false; // TODO: 实现缓存检查
    }
    
    private Object getFromCache(String key) {
        // 从缓存获取结果
        return null; // TODO: 实现缓存获取
    }
    
    private Object proceed(ProceedingJoinPoint point, String key) throws Throwable {
        // 执行实际方法并缓存结果
        Object result = point.proceed();
        // TODO: 缓存结果
        return result;
    }
} 